White rust of mustard caused by Albugo cruciferarum S.F gray is a major factor in reducing the yield of the crop in Tarai region of Eastern U. P.. The use of resistant variety is the best methods to manage this disease. Therefore, 170 rapeseed and mustard genotype have been screened during 2001–2002 and 2002–2003 cropping season.
Out of 170 genotype, only 74 showed similar disease response during both the years of testing. Five genotype, namely WRR-98-01, NORS-2004, NDRS-2013, NDRS-2005 and NDRS-2007 were disease free; Eighteen genotypes viz, RC-781, RIK-75-5, RIK-78-4, CSR-721, PI-43, VRT-3, NDRE-7, NNRE10, NDVR-29xNORE-04NORE-190xNORE-4CSCN-5, CSCN-3, CSCN-10, CSCN-12, NSRS-2006, NDRS-2009, NDRS-12, and NDRS-2014 were rated as resistant. Twenty three genotypes, namely R71-2, 2-B-2146, RIK 75-3 VRT-4 RW-336-B, VRT-6, P-17/17, RIK 46-1 App Pod mutant, Pakari Rai, CSR-622, RK-8401, RH-771 I, NDVR-29, NDVR-32, NDR-2001, NDR-8208, NOR-8604, N.raixNDRE04, CSCN-11, CSCN-1 and CSCN-7 were rated as moderately resistant. Seventeen genotypes viz, RK-2512, R-71-7, TM-4, RS-3, VRT-1, NDR-8501, CSR-416, Kranti, RW-2-2, DIR-202, RW-29-6, Narendra ageti, Vardan, NDVR-8, CSCN-6, CSCN-8 and CSCN-9 showed moderately susceptible response. Seven genotypes viz., CSR-133, RP-14, RH-7361, VST-1, RK-8403, PR-2030 and Urvasi were rated as susceptible and five genotypes Viz, TM-2, RP-17113, RF-9, PHR-1 and Varuna were rated as highly susceptible. Genotypes showing consistently high degree of resistance may be utillized further for the development of high yielding disease resistant commercial varieties.
White rust, mustard, rapeseed, genotype, screening
